on the democratic side, elizabeth warren of massachusetts complained the fed still isn't doing enough to limit the size and dominance of big banks. >> the truth is if the regulators had done their jobs and reined in the banks, we wouldn't need to be talking about quantitative easing because we could have avoided the 2008 crisis altogether. >> reporter: yellen agreed with the need to increase monitoring of the financial system. she also noted that the government shutdown and debt ceiling brinksmanship have hindered efforts to boost the economy. looking ahead, yellen pledged to continue the push by outgoing fed chairman ben bernanke for greater transparency in what the fed is doing and how. >> woodruff: now to our newsmaker interview with b. todd jones, the new director of the federal bureau of alcohol, firearms, tobacco and explosives. the agency, charged with keeping track of the nation's 300 million guns, lacked a permanent head for the last seven years. jones was appointed shortly after the tragic shooting at sandy hook elementary in newtown, connecticut, and confirmed in july. i sp